Aha. Thanks.
Here's the issue that has come up with battletech time and again over the last 25 years.....
There have been a large number of "reasons" but the main reason for the short ranges in battletech is because it is battletech, not artillerytech.
These questions about range usually came up along with the questions as to why your targeting system cannot aim the medium laser, and small laser, mounted on the same arm, and fired together, equally well at 60 meters? (short for the mlas, medium range for the slas).....
The long and short was to make it a playable game ----
I've seen suggestions from players that all lasers should have the same range, and if mounted in the same location, should hit the same location --- all weapons in an arm should hit if the to hit roll is made, and all do damage to the same location....
Never mind that if all lasers had the same range, and could group hit like this, every mech in the game would have packs of small lasers, and nothing else mounted.... Large laser, 5 tons, 8 heat / 8 damage, or a triple pack of small lasers, same range.... 1.5 tons, 3 heat / 9 damage..... why would you waste time with anything other than small lasers, heat sinks, and armor?
The best bet is just to let the game play, and enjoy it with other people, but leave the "realism" outside of the game --- battletech is no more real than Dungeons & Dragons is real....
Nahuris